Title :
High-efficiency focusing grating coupler for large-scale silicon photonic integration
Author :
Biao Yang ; Zhi-Yong Li ; Xi Xiao ; Yu Jin-Zhong ; Yu Yu-De
Author_Institution :
State Key Lab. for Integrated Optoelectron., Inst. of Semicond., Beijing, China
Abstract :
A novel high-efficiency compact optical coupler employing curved gratings with non-uniform pitches is proposed to coupling light off or into silicon photonic chips for large-scale integrated functions. The optimized non-uniform pitches improve the coupling efficiency of single-mode fiber and waveguide by reducing the mode matching loss between the fiber and grating coupler. This kind of focusing grating coupler has a decreased transition length between the grating and single-mode waveguide.
Keywords :
diffraction gratings; elemental semiconductors; integrated optoelectronics; mode matching; optical fibre couplers; optical fibre losses; optical focusing; silicon; Si; curved gratings; high-efficiency focusing compact optical grating coupler; large-scale silicon photonic integration; mode matching loss; optimized nonuniform pitches; silicon photonic chips; single-mode fiber; single-mode waveguide; transition length; Couplers; Couplings; Fiber gratings; Focusing; Gratings; Optical fiber couplers; SOI; grating coupler; photonic integrated circuits; silicon photonics;
Conference_Titel :
Optoelectronics and Microelectronics (ICOM), 2013 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4799-1214-8
DOI :
10.1109/ICoOM.2013.6626516
